/* Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.activiti.engine.impl.pvm.runtime;

import org.activiti.engine.ActivitiException;
import org.activiti.engine.impl.pvm.delegate.SubProcessActivityBehavior;
import org.activiti.engine.impl.pvm.process.ActivityImpl;
import org.activiti.engine.impl.pvm.process.ScopeImpl;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author Tom Baeyens
 */
public class AtomicOperationProcessEnd extends AbstractEventAtomicOperation {

    private static final Logger LOGGER = LoggerFactory.getLogger(AtomicOperationProcessEnd.class);

    @Override
    protected ScopeImpl getScope(InterpretableExecution execution) {
        return execution.getProcessDefinition();
    }

    @Override
    protected String getEventName() {
        return org.activiti.engine.impl.pvm.PvmEvent.EVENTNAME_END;
    }

    @Override
    protected void eventNotificationsCompleted(InterpretableExecution execution) {
        InterpretableExecution superExecution = execution.getSuperExecution();
        SubProcessActivityBehavior subProcessActivityBehavior = null;

        // copy variables before destroying the ended sub process instance
        if (superExecution != null) {
            ActivityImpl activity = (ActivityImpl) superExecution.getActivity();
            subProcessActivityBehavior = (SubProcessActivityBehavior) activity.getActivityBehavior();
            try {
                subProcessActivityBehavior.completing(superExecution, execution);
            } catch (RuntimeException e) {
                LOGGER.error("Error while completing sub process of execution {}", execution, e);
                throw e;
            } catch (Exception e) {
                LOGGER.error("Error while completing sub process of execution {}", execution, e);
                throw new ActivitiException("Error while completing sub process of execution " + execution, e);
            }
        }

        execution.destroy();
        execution.remove();

        // and trigger execution afterwards
        if (superExecution != null) {
            superExecution.setSubProcessInstance(null);
            try {
                subProcessActivityBehavior.completed(superExecution);
            } catch (RuntimeException e) {
                LOGGER.error("Error while completing sub process of execution {}", execution, e);
                throw e;
            } catch (Exception e) {
                LOGGER.error("Error while completing sub process of execution {}", execution, e);
                throw new ActivitiException("Error while completing sub process of execution " + execution, e);
            }
        }
    }
}
